Every type from fighters to helicopters from air forces around the globe, Classic Airliners Near the back of the flight manual is a full page Limitations with all the V speeds and Placard speeds. So, 10 percent of this essay, is "Review", and 90 percent about the history of the Learjet ? The XP design team did a good job with what they had to work with. The panel has been cleaned up, regrouped and made somewhat prettier. Dial markings are based on percent of maximum allowable engine speed. The cabin pressure is provided by the conditioned air entering the cabin through the distribution ducts and controlled by modulating the amount of air exhausted from the cabin. Production of the Learjet 24 began in 1966 and continued through 1977, with a total of 259 aircraft built. All the early or classic Learjets had to burn off about 2,000 pounds of fuel to get the weight down to the Maximum Landing Weight. WebCertified to the stricter FAR Part 25, the $13.8 million Learjet 75 competes with the Embraer Phenom 300 and the Citation CJ4, beating them in cabin volume, with 364 cu ft (10.3 m 3) against 327 and 295 cu ft (9.3 Fuel burn at high-speed cruise: 1,079 lb/h (489 kg/h) at 451 kn TAS at FL470 The XP GLJ-25SE does not identify the AP model number anyplace in the manual, but it is a probably model as a J.E.T. This valve controlls * All weight in excess of the Max ZFW must be fuel in the - 25 C In standby, it powers just the gyro The trim check very important on the Lear Jet, as the trim system The system operates the landing History. Robertson, of STOL fame, also took a crack at adding small winglets on top of the wingtip fuel tanks to try to enhance the endurance of the Model 25 along with replacing the GE CJ610 engines with PW JT15D-5 engines to add STOL capability to the already hot Model 25. I now have these items properly introduced and scheduled in my new more leisurely work schedule. The drag chute has been deployed in a crosswind of up to 20 knots under actual test conditions. On May 17, 2017, a Learjet 25B registration XA-VMC operated by the company Aerotransportes Huitzilin S. A. de C. V. crashed at 3:26p.m. local time shortly after taking off from Toluca International Airport, Mexico bound for Durango. Fuelburn: 149.0 GPH The engine compressor inlet and turbine discharge pressures are sensed by the EPR transmitter and transformed into an electrical signal that is transmitted to the EPR indicator. Not only the F1 GTN but you can also have your working REX/Milviz Advantage weather radar. The 30 series have much more fuel efficient engines, not to mention quieter. The 25 seats up to 10 passengers plus 2 pilot(s). Mr. Gates took over as President and COO of Lear Jet and Bill Lear stayed on for a year or so as Chairman but wasnt involved in the Lear Jet project or day to day operations. It would have been a wonderful addition if they had spent another day or so and added the climb, cruise, and descent details to the example. Both are powered by aft-fuselage-mounted, twin Honeywell TFE731-40BR turbofans, with a top speed of an impressive 535 mph (465 knots) and an average fuel burn of just under 200 gallons per hour. . The nose wheel has a specially moulded tire to prevent water splashing into the engines. March 28, 1980 - Gates Learjet flies high with its one-thousandth sale. . Flying yourself's a beautiful thing! The time required to accelerate from idle to 100% RPM is approximately four seconds. Before we get into the specifics of our Xtreme Prototypess simulated GLJ 25 SE model, I would like to tell you the story, very abbreviated of course, of the trials and tribulations of designing a replacement for the Model 25. The largest seller is the Model 25, but more 35s were sold in the past six years. If the yellow disc is ruptured, either or both containers have been discharged into the engine nacelle. Total Cost of Ownership: $700,646.69 Parts for the 25 series are becoming some what of a problem, as 35 series is a much better aircraft in regards to operating costs. Best Range (i): 1,590 NM Fuel Burn: 256.0 GPH Stall Speed: 90 KIAS Rate of climb: 6,900 FPM Ceiling: 45,000 FT Takeoff distance: 3,393 FT Landing distance: 3,310 FT Weights Gross Weight: 12,499 LBS Empty Weight: 6,150 LBS Fuel capacity: 834 GAL Ownership Costs 1965 Total Cost of Ownership: Register For Free Total Fixed Cost They have their own book for the 30 series Learjets. I suppose you heard the current joke, Owner - How much do you think my beautiful, well maintained Gates Learjet 25 is worth? Salesman That all depends on how much fuel is in the tanks! Sigh. The Classic GLJ Model 25 SE runs smooth as butter on my test system. WebEvery Lear that comes out of the factory is equipped to fly itself. Photos taken by airborne photographers of airborne aircraft, Special Paint Schemes Thanks to its Honeywell TFE731-2 engines, the Learjet 31 has a total thrust output of 7,000 lbs. I was rewarded with free download links for a Learjet 24/25 Cockpit Reference Handbook and the Learjet 25 Operating Handbook that has the performance charts. The 51,000 feet altitude Certification was added for all 25D/F models, although the specs are a little vague in the XO manual. Hydraulic pressure for retraction and extension of the gear is transmitted by a system of tubing, hoses and actuating cylinders and is electrically controlled by limit switches and solenoid valves. If you can't afford a used PC-12 you can't afford a flight department to run it. This is an FSX limitation, no Ramp Weight field. On the east coast of the U.S. center contollers will not allow you to get to those altitudes very quick making the aircraft sucking the fuel down. FAA certified on September 4, 1970. Moving the tip tanks out undoubtedly added inertia and so, to increase lateral control without heavying up the feel, spoilerons are now used for additional roll command. This Century III wing enhancement was introduced by Gates in 1976 for the new Model 35, but we also got the benefit because the Model 25D was a concurrent production airplane in the late 1970s. Embraer is the latest manufacturer entering the business jet market with the Phenom and Legacy lines of business jets. The Model 25 was introduced just prior to Gates taking over the majority ownership of Lear Jet in late 1966. I even like the default EICAS panel feature because I am only one click away from having the GTNs or weather radar in the panel. Sorry, sometimes I get carried away with this stuff. An acoustical kit is being developed for those earlier airplanes and they will remain in production for a little while longer. In terms of cost, the Learjet 60 has an estimated hourly charter price of $4,250. It comes only as a pdf and in two editions the full blown 160 pages that in provided to registered user and a still excellent 70 page Sample Version for those who wish to see some detail prior to purchase. Lear never used an A designator for any production Model 25, only on the Model 24. A pre-owned Lear 70/75 fetches between $5.50 million and $9.25 million. An oxygen rupture disc will relieve oxygen pressure if the oxygen cylinder pressure reaches 2700 to 3000 psi. In 1970 the Learjet 25B was produced along with the Learjet 25C in the same year. It is fairly easy to narrow down the identity of a Learjet with 3 or more small fuselage windows with large wingtip fuel tanks. The Bombardier Learjet 45XR can cruise at up to 51,000 feet. On aircraft equipped with variable authority steering, the steering authority varies with ground speed. Any changes are a little more difficult until you fully understand the logic and procedure. (the Learjet 25D was certified for FL510). These boundary layer energizers are small spanwise ridges on the upper wing surface just ahead of the aileron. By the Numbers Recent Learjet sales is a very weak third place behind Cessna and Embraer. Some of the milestones credited to Gates leadership was actually accomplished prior to the Gates takeover. This free Sample Version has more information in it than most developers provide for competing products. This one got interrupted a couple of times and I feel guilty that it took me so long to finally complete the review. The indicator face is divided into green (safe), yellow (caution) and red (danger) segments. On the east coast of the U.S. center contollers will not allow you to get to those altitudes very quick making the aircraft sucking the fuel down. The engine compartments consist of an eight-stage axial-flow compressor directly coupled to a two-stage turbine, a through-flow annular combustion system, variable inlet guide vanes, controlled compressor interstage bleed, exhaust nozzle and accessory drive system. The 31 is also still in production, although speculation is that the 31 line (which has been very sluggish) will shut down with the introduction of the 40. WebThe Learjet 25 generally has five fuel tanks. Here is a recent price break down from Business and Corporate Aviation magazine. WebFuel Burn: 257.4 GPH Stall Speed: 87 KIAS Rate of climb: 6,800 FPM Rate of climb (1 engine out): 2,050 FPM Ceiling: 51,000 FT Ceiling (1 engine out): 27,000 FT Takeoff distance: 3,393 FT Landing distance: 3,310 FT Weights Gross Weight: 13,500 LBS Empty Weight: 7,327 LBS Maximum Payload: 3,760 LBS Fuel capacity: 840 GAL Ownership New safety features were high on the priority list like the Century III wing design with SoftFlite to improve the low speed handling characteristics to appeal more to the general aviation corporate pilots and less to the ex-military trained corporate pilots. What is not shown in the accompanying artists sketch is just how large those new Garrett engines would be, or the fuselage stretch, or the increased wing span with that now familiar looking two foot section added out near the tips. The brake system incorporates four power-boosted disc-type brakes with integral anti-skid system. 1,000 nm fuel burn for the Model 25D is 3,920 pounds, compared to 2,530 pounds for the Model 35/36, and 2,480 for the Model 31A. Garrett fanjet Engines for the Model 35 a real hodgepodge of parts. There were several Model 25 Learjets starting with the basic or original Model 25 that was introduced as the Stretched or Long Range Learjet. There were no plans to increase the length or height of the small tube fuselage so this Model 35 would not be in competition with the future 40 and 50 series enlarged fuselage models. You can find that post in the screenshot forum. The airplane was destroyed on the ground. Best Range (i): 1,590 NM Fuel Burn: 256.0 GPH Stall Speed: 90 KIAS Rate of climb: 6,900 FPM Ceiling: 45,000 FT Takeoff distance: 3,393 FT Landing distance: 3,310 FT Weights Gross Weight: 12,499 LBS Empty Weight: 6,150 LBS Fuel capacity: 834 GAL Ownership Costs 1965 Total Cost of Ownership: Register For Free Total Fixed Cost Thanks to its Honeywell TFE731-20BR engines, the Learjet 45XR has a total thrust output of 7,000 lbs. The bleed air is cooled in the heat exchanger by ram air entering the dorsal fin inlet and passing through the heat exchanger. I like this Classic Learjet a lot. You will find more and more nifty features designed into this add on as you spend more time flying. And best of all, I can place my Flight1 GTN combo in the VC panel with a super simple line change in the aircraft.cfg file. It's got autopilots that will do everything but put sugar in your coffee. http://www.ferrarichat.com/forum/showthread.php?t=370969, (You must log in or sign up to post here. Now, that would be ideal, maybe even make a video. The 36, because the normal behind-the-aft seat baggage area was removed to make room for the larger fuselage fuel tank, has a small luggage area opposite the door under which a slide-out potty is stowed. Just when I thought I had it all together and had a plan of action to get this review done by Christmas, along comes Black Friday week, then Cyber Monday and then all those extended deadlines. The inboard doors are hydraulically operated while the outboard doors are mechanically operated by linkage connected to the main gear struts. Or you could always get a Notar. WebThe Lear 70 cruises 11% faster than the CJ3, and has an tremendous ceiling of FL510, allowing operators to climb into the smoothest air and optimize fuel efficiency. Every conversation stressed the Learjets FAR 25, Transport Category certification, the very same certification level as a Boeing 747. The Learjet 25 offers an ideal high speed platform for business travel for six to eight passengers. I have been told that the aircraft likes the dutch roll during landing approach or the student like to do it and you need to declare fuel critical while taxing out. An audible waning horn warns of flap extension to more than 25 degrees if the landing gear is not down and locked. If you happen to be overtaken at normal cruise, which could be at 51,000 feet, it will be one of the Gulfstreams or a Citation X or another Learjet. You can find a series of great screenshots of the XP GLJ 25 SE in flight in our screenshot forum. It had the old Air Force engines on it. I think the upper level VMO is actually 350 kts, provided it has the Century III wing. The pointer responds to the dynamic pressure from the pitot heads on the nose compartment. It's got a stick shaker unit that forces the nose down if you get it too slow, pulls it up if you get too fast, A pressure switch will energize the pump if hydraulic pressure falls below a preset level and de-energize the pump when pressure returns to normal. One of the Learjet milestones was the delivery of the 500th Learjet, Learjet 25D on April 8, 1975 to the Mexican Navy. A fuel control metering system selects the rate of fuel flow to the engine combustor.[3]. The hydraulically retractable landing gear is of conventional tricycle configuration with air-hydraulic shock-type nose and main gear. Flight planning or any other aircraft operations should only be done using official technical information provided The Flysimware Lear fuel burn more or less works out when using a M0.71-M0.72 cruise, which I've always considered to be quite slow. ) The closer you zoom in to the panel to more you appreciate just how well these new 3D gauges are performing super sharp image for my old eyes. Views from inside the cockpit, Aircraft Cabins Pretty heady stuff, this Century III wing mod. On the same amount of fuel the Model 35 has a range of 2,630 nm against 1,621 for the Model 25B; the Model 36 endurance is 3,146 nm to 1,861 for the 25C. ( At idle on the ground a 20 series learjet will burn something like 150 +or- us gallons per hour. The Century III wing modification alone lowered the final approach speed by an astounding 15% without any loss of cruise speed while reducing the landing distance by nearly 1,000 feet for the new Model 35. Talking about those small fuselage Learjets, take a look at this comparison of a Lear Model 25 fuselage diameter compared to the Learstar 600 design. At idle on the ground a 20 series learjet will burn something like 150 +or- us gallons per hour. The steering system on aircraft without variable authority nose wheel steering requires the pilot to select master or primary steering mode. Thanks to its Pratt & Whitney Canada PW305A engines, the Learjet 60 has a total thrust output of 9,200 lbs. This is achieved by removing the starboard seating to allow for a stretcher, mounting oxygen bottles and intravenous drip equipment. Photo: A Gates Learjet showing enormous size of fanjet engines. Of course, the Model 25 was an improvement of the Model 24 that had replaced the original Model 23 the one that started it all. I especially like the fact that we get all three installers, 10 very nice repaints, an outstanding flight manual and a highly tuned flight model that will cruise at Mach 0.82. It's got a stick shaker unit that forces the nose down if you get it too slow, pulls it up if you get too fast, Wow. Here is a recent price break down from Business and Corporate Aviation magazine. A drag chute is fitted as optional equipment on some Learjet 25 aircraft. Only $1.1 MM for the full mod. A used Lear @ $675,000USD will cost more than the savings on a PC-12 over the course of a year. [2], Two General Electric CJ610-6 single-rotor axial-flow turbojet engines are pylon-mounted on the aft fuselage. One of our Planephd Experts will be in touch with you shortly. The amount of bleed air cooling at the heat exchanger can be controlled by the hot air bypass valve (H-valve). To overcome the problem, they added 13 inches to the fuselage ahead of the wings leading edge. Fuel flow is indicated via a fuel flow system. There are more Learjets in service than any other business jet. The spoilers provide an effective means of increasing normal rates of descent and may be used as a drag device to achieve rapid airspeed deceleration. Parts are actually less of an issue with a 25 than you might think, because so many have been scrapped that you can usually find used parts. How about time to climb to 15,000 meters (just shy of 51,000 feet) in 12 minutes, 27 seconds? 340 You really need to do your self a favor, and go to your local private airport, find a Company that does Lear maintenance. The often mentioned price of Jet fuel in 1975 across the nation was less than 30 cents/gallon, but would go absolutely insane a few years later. I am getting a little lazy in my old age so I am going to paste the GE engine history here in lieu of typing it from scratch. Part of MOTORSPORT NETWORK. A tank cross-flow valve is installed to prevent fuel transfer between wing tanks. To complete the design efforts that started with the somewhat simplified plan of upgrading the Model 25 with newer fuel efficient and quieter engines with a little more thrust turned into a longer, wider, more powerful new model with much improved low speed handling while retaining excellent cruise speeds at the highest flight levels allowed. We thank you for your support and hope you'll join the largest aviation community on the web. The best glide distance with engines windmilling is obtained with a clean airplane configuration and with a glide speed of 160 to 170 knots. This mode is suitable for straight taxi, takeoff and gentle turns. Two motor-driven shutoff valves will stop hydraulic flow to the engine-driven pumps in case of an emergency. Thanks to its Honeywell TFE731-20BR engines, the Learjet 45XR has a total thrust output of 7,000 lbs. Most Learjet 25 aircraft were fitted with a fuselage tank. Get my point? A pre-charged accumulator dampens and absorbs pressure surges. When I asked, the developer about it, he agreed that Fuel Jettison would be a nice feature, but stated they have to draw the line someplace or they would never complete the package. Any Learjet 25s that have not been modified by installing noise compliant engines or "hushkits" will not be permitted to fly in the contiguous 48 states after December 31, 2015. Additionally, the Learjet 45XR has an average hourly fuel burn of 204 Gallons per Hour (GPH). At idle on the ground a 20 series learjet will burn something like 150 +or- us gallons per hour. This is from the XP Flight Manual. Oxygen is contained in a pressurized bottle located in the dorsal fin of the aircraft.